I miss a gcc warning
Andrew Haley
aph-gcc@littlepinkcloud.COM
Thu Oct 25 14:00:00 GMT 2007
Tibor Vidók writes:
> Porting an application to x86_64 I found a line, where I assign an
> uintptr_t to an unsigned int an I wondered why I didnt get any
> warning.
> I definitely remember that I got warnings in such cases before so I
> tried to add some stupid lines to the code to get the warning, but I
> couldn't make the code bad enough.
>
> Is it a gcc-issue? or I forget to add some -Wxxx switches? Or gcc
> should't wanr me in case of uintptr_t to <some small> cast?
uintptr_t is just a typedef for unsigned long int. If you have a
warning for every assignment that caused a truncation you'd have an
awful lot of warnings.
Any use of uintptr_t should ring an alarm bell. That's the real cause
of the bug, not anything else. There are some real uses for
uintptr_t, but they are fairly obscure.
Andrew.
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